Carrier 50PQ User Manual

Introduction to the 50PQ series, highlighting all-electric, energy-efficient rooftop units for commercial/industrial use.

Highlights the ease of installation, low-cost operation, and simple maintenance of the 50PQ heat pump.

Details the self-contained, efficient, and practical nature of the 50PQ rooftop heat pump.

Describes the weathertight Weather Armor cabinet and robust design for outdoor operation.

Explains dual refrigeration circuits and variable refrigeration circuiting for efficiency and reliability.

Covers features like ventilation air control and convenient duct connections for flexible installation.

Details components like refrigerant coils, indoor blowers, outdoor fans, and heavy-duty compressors.

Explains Chronotemp defrost system and Signal-LOC compressor protection for reliable operation.

Describes economizer assembly, remote control panel, and thermostat options for enhanced control.

Details options like alternate motor drive, relief damper, Motormaster, and electric resistance heaters.

Provides dimensions for standard, double height, and side/supply roof curbs.

Presents detailed physical data for 50PQ012 and 50PQ016 units, including weights and component sizes.

Guides on determining job requirements, unit size, and heating/electric heater selection.

Presents ARI cooling, heating @ 47F, and heating @ 17F capacity ratings.

Provides detailed gross cooling capacities based on various indoor/outdoor conditions.

Details fan performance metrics like RPM, BHP, and static pressure for different CFM.

Presents integrated heating capacities across various outdoor temperatures and airflows.

Provides indoor fan RPM data and static pressure losses for accessories.

Details voltage, compressor, fan motor, heater, and power supply electrical data for unit models.

Explains cooling, heating, auto changeover, defrost, and economizer operating sequences.

Covers Signal-LOC protection, emergency heat, and Time Guard accessory controls.

Provides guidance on ductwork, field power, condensate traps, and operating limits.

Discusses low ambient cooling operation, roof curb requirements, and unit selection criteria.

Illustrates the typical electrical schematic diagram for the heat pump system.

Explains the symbols and abbreviations used in the schematic diagram.

Details base unit requirements, cooling capacity, and net sensible capacity.

Covers heating capacity, electric heat, compressor, coils, fans, cabinet, controls, and defrost.

Specifies maximum dimensions and lists available accessories and options.